Past affiliation(s) within the IAU

• Past President of Commission 40 Radio Astronomy (1979-1982)
• Past Vice-President of Commission 40 Radio Astronomy (1976-1979)
• Past Organizing Committee Member of Commission 38 Exchange of Astronomers (1988-1991)
• Past Organizing Committee Member of Commission 38 Exchange of Astronomers (1985-1988)
• Past Organizing Committee Member of Commission 40 Radio Astronomy (1982-1985)
• Past Organizing Committee Member of Commission 40 Radio Astronomy (1970-1973)
• Past Member of Commission 38 Exchange of Astronomers
• Past Member of Inter-Division X-XII WG Historic Radio Astronomy
• Past Member of Division B Facilities, Technologies and Data Science (until 2020)
• Past Member of Division C Education, Outreach and Heritage (until 2020)
• Past Member of Commission B4 Radio Astronomy (2015-2020)
• Past Member of Inter-Commission B4-C3 WG Historical Radio Astronomy (Inter-Union IAU-URSI) (2015-2020)
• Past Member of Commission 40 Radio Astronomy (until 2015)
• Past Member of Commission 41 History of Astronomy (until 2015)
• Past Member of Commission 46 Astronomy Education & Development (until 2015)
• Past Member of Commission 40 WG Historic Radio Astronomy (until 2015)
• Past Member of Division X Radio Astronomy (until 2012)
• Past Member of Division XII Union-Wide Activities (until 2012)
• Past Member of Special Nominating Committee (1994-1997)
• Past Member of Special Nominating Committee (1985-1988)